YSI 111-1 [605080] Double Junction pH / Temperature Sensor w/ 1m Cable. The YSI 605080 111-1 is a pH sensor for the YSI pH100 meter and has a double polyvinylidene fluoride (PVDF) junction, conical glass tip, 1m (3.3') cable, and operates in pressures up to 100 pounds per square inch gauge (PSIG). A pH electrode is commonly attached to a pH meter to measure the pH of a substance such as water, food, beer, or wine in lab, industrial, and food applications. The double PVDF junction of this electrode reduces sample solution ingress into the reference compartment for long electrode life. The conical glass tip is for piercing semisolid materials such as meat, cheese, soils, and yogurt. The electrode pressure range is 0 to 100 PSIG. The 1m (3.3') cable has an Ingress Protection (IP) 67 rating to the connector, and the connector is water resistant.